Roy L. Adler, Don Coppersmith, et al.
IEEE Trans. Inf. Theory
A new algorithm for computing Hadamard transforms is presented. If n is a power of four, then the new algorithm uses ⅞ n logn multiply/adds to compute a Hadamard transform of length n. © 1994 IEEE
Roy L. Adler, Don Coppersmith, et al.
IEEE Trans. Inf. Theory
Ephraim Feig
Journal of Algorithms
Don Coppersmith, Steven Phillips
SIAM Journal on Discrete Mathematics
Don Coppersmith
Mathematics of Computation